package com.xyc.www.gulimall.cart.vo;

import lombok.Data;

import java.math.BigDecimal;
import java.util.List;

/**
 * 整个购物车
 * 需要计算的属性，必须要重写它的get方法，保证每次获取属性都会进行计算
 */
@Data
public class Cart {
    private List<CartItem> items;
    private Integer countNum;//商品数量
    private Integer countType;//商品类型
    private BigDecimal totalAmount;//商品总价
    private BigDecimal reduce = new BigDecimal("0");//减免价格

    public Integer getCountNum() {
        int count = 0;
        if (items != null && !items.isEmpty()) {
            for (CartItem item : items) {
                count += item.getCount();
            }
        }
        return count;
    }

    public Integer getCountType() {
        int count = 0;
        if (items != null && !items.isEmpty()) {
            for (CartItem item : items) {
                count += 1;
            }
        }
        return countType;
    }

    public BigDecimal getTotalAmount() {
        BigDecimal amount = new BigDecimal("0");
        //1、计算购物项总价
        if (items != null && !items.isEmpty()) {
            for (CartItem item : items) {
                if (item.getCheck()) {
                    amount = amount.add(item.getTotalPrice());
                }
            }
        }
        //2、减去优惠总价
        return amount.subtract(getReduce());
    }
}
